tda9874aps NXP Semiconductors, tda9874aps Datasheet - Page 47

• Manufacturer Part Number: tda9874aps
• Description: Digital Tv Sound Demodulator/decoder
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7.4.4
The contents of these two registers provide information on the additional data bits. AD byte 0 is stored at subaddress 3.
Table 78 Data register DR1 (subaddress 3)
Table 79 Description of the data register DR1 bits
Table 80 Data register DR2 (subaddress 4)
Table 81 Description of the data register DR2 bits
2000 Aug 04
Digital TV sound demodulator/decoder
OVW
AD7
BIT
BIT
7
7
6
5
4
3
2
1
0
7
7
6
5
4
3
2
1
0
D
ATA REGISTERS
SYMBOL
SYMBOL
AD10
OVW
SAD
SAD
AD6
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
AD9
AD8
CI1
CI2
6
6
DR1
AND
the lower 8 bits of the additional data word
If this bit is logic 1 new additional data bits are written to the IC without the previous bits
being read.
If bit SAD = 1 new additional data is written into the IC. This bit is reset when the
additional data bits are read.
this bit is undefined
These bits are CI bits decoded by majority logic from the parity checks of the last ten
samples in a frame.
the upper 3 bits of the additional data word
AD5
DR2
5
5
AD4
CI1
4
4
47
AD3
CI2
3
3
DESCRIPTION
DESCRIPTION
AD10
AD2
2
2
AD1
AD9
1
1
Product specification
TDA9874A
AD0
AD8
0
0